NCDAP Arithmetic 4

Question 1

Which of the following is NOT an integer?

Accepted Answer

5/3

Answer

5/3 ≈ 1.667, which is not a whole number, so it is not an integer.

Question 2

Subtract: 7⅓ − 2¾

Accepted Answer

4 7/12

Answer

7⅓ = 88/12 and 2¾ = 33/12; 88/12 − 33/12 = 55/12 = 4 7/12.

Question 3

A box contains red, blue, and green marbles in the ratio 2:3:5. If there are 40 marbles total, how many are blue?

Accepted Answer

12

Answer

The ratio sum is 10 parts; blue = 3/10 × 40 = 12.

Question 4

What is the result of −18 ÷ (−3)?

Accepted Answer

6

Answer

A negative divided by a negative equals a positive: −18 ÷ −3 = 6.

Question 5

Round 4,867.349 to the nearest tenth.

Accepted Answer

4,867.3

Answer

The hundredths digit is 4 (less than 5), so the tenths digit stays at 3: 4,867.3.

(NCDAP) North Carolina Diagnostic Placement Test Practice Test